Rock Identifier

Category

Sedimentary (Formed From Silica Deposits)

Browse sedimentary (formed from silica deposits) specimens identified by the Rock Identifier community.

Learn about Sedimentary (Formed From Silica Deposits) in the encyclopedia

Geyserite

Quartzite Sandstone

Quartzite Sandstone

Turbidite

Kambaba Jasper

Tripolite

Sinter

Ignimbrite

Loess

Quartzite

Chert

Coal

Silcrete

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Chalcedony (Agate/Common Opal blend) (Microcrystalline Quartz (SiO2)) — mineral

Chalcedony (Agate/Common Opal blend)

Microcrystalline Quartz (SiO2)

Likely iron-stained chert or chalcedony pebble (Microcrystalline quartz (SiO₂), possibly ferruginous chert) — mineral

Likely iron-stained chert or chalcedony pebble

Microcrystalline quartz (SiO₂), possibly ferruginous chert

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Jasper (Silicon dioxide (SiO2) with iron inclusions) — sedimentary

Jasper

Silicon dioxide (SiO2) with iron inclusions

Flint (chert) (Microcrystalline quartz (SiO₂), variety of chert) — sedimentary

Flint (chert)

Microcrystalline quartz (SiO₂), variety of chert

$Clear quartz crystal (Quartz (SiO₂), likely a small rough or naturally fractured crystal) — mineral$

Clear quartz crystal

Quartz (SiO₂), likely a small rough or naturally fractured crystal

Red Jasper (SiO2 (Silicon Dioxide) with Iron oxides) — sedimentary

Red Jasper

SiO2 (Silicon Dioxide) with Iron oxides

Agate (Silicon dioxide (Chalcedony), SiO2) — sedimentary

Agate

Silicon dioxide (Chalcedony), SiO2

Chert (Jasper variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper variety)

Microcrystalline Quartz (SiO2)

Chert (Iron-stained) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Flint variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert Pebble (Water-worn Siliceous Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Pebble (Water-worn Siliceous Pebble)

Microcrystalline Quartz (SiO2)

Sphalerite (Zinc Sulfide (ZnS)) — mineral

Sphalerite

Zinc Sulfide (ZnS)

Black-and-white jasper (Jasper, microcrystalline quartz (SiO₂), with contrasting white mineral inclusions) — metamorphic

Black-and-white jasper

Jasper, microcrystalline quartz (SiO₂), with contrasting white mineral inclusions

Zebra Jasper (Tetragonal Silicon Dioxide (Quartz) with impurities) — sedimentary

Zebra Jasper

Tetragonal Silicon Dioxide (Quartz) with impurities

Chert (Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline Quartz (SiO2)

River Stone (likely Quartzite or Chert) (Sedimentary rock composed of Silicon Dioxide (SiO2)) — sedimentary

River Stone (likely Quartzite or Chert)

Sedimentary rock composed of Silicon Dioxide (SiO2)

Milky quartz (Quartz (SiO₂), likely massive or microcrystalline quartz) — mineral

Milky quartz

Quartz (SiO₂), likely massive or microcrystalline quartz

Banded chert (likely jasper/chalcedony) (Microcrystalline quartz (SiO₂), chiefly chert with iron-oxide staining) — sedimentary

Banded chert (likely jasper/chalcedony)

Microcrystalline quartz (SiO₂), chiefly chert with iron-oxide staining

Chert (Jasper variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Banded Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Microcrystalline Quartz (SiO2)

Chert (Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Flint)

Silicon Dioxide (SiO2)

Polished or naturally smoothed jasper/chalcedony pebble (Microcrystalline quartz (SiO₂), likely iron-stained jasper with chalcedony) — sedimentary

Polished or naturally smoothed jasper/chalcedony pebble

Microcrystalline quartz (SiO₂), likely iron-stained jasper with chalcedony

Agate Geode (Silicon Dioxide (SiO2)) — mineral

Agate Geode

Silicon Dioxide (SiO2)

Jasper (Yellow/Brown) (Silicon Dioxide (SiO2) with impurities) — mineral

Jasper (Yellow/Brown)

Silicon Dioxide (SiO2) with impurities

Yellow Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Silicified fossil shell, likely fossil oyster or clam (Silicified bivalve fossil; shell originally aragonite/calcite, partly replaced by chalcedony (SiO₂)) — fossil

Silicified fossil shell, likely fossil oyster or clam

Silicified bivalve fossil; shell originally aragonite/calcite, partly replaced by chalcedony (SiO₂)

Yellow Jasper (Silicon Dioxide (SiO2) with iron hydroxides) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides

Yellow Jasper (Silicon dioxide (SiO2)) — sedimentary

Yellow Jasper

Silicon dioxide (SiO2)

Chert (specifically tan/pink variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (specifically tan/pink variety)

Silicon Dioxide (SiO2)

Reddish weathered rock, possibly jasper or iron-rich chert (Microcrystalline quartz (SiO₂), if jasper/chert; abundant iron oxides such as hematite/goethite) — mineral

Reddish weathered rock, possibly jasper or iron-rich chert

Microcrystalline quartz (SiO₂), if jasper/chert; abundant iron oxides such as hematite/goethite

Petrified Wood (Silicified wood (Quartz/Chalcedony/Opal replacing organic matter)) — sedimentary

Petrified Wood

Silicified wood (Quartz/Chalcedony/Opal replacing organic matter)

Red Agate Sphere (Chalcedony (SiO2 with iron oxide inclusions)) — sedimentary

Red Agate Sphere

Chalcedony (SiO2 with iron oxide inclusions)

Red Jasper (Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Yellow Jasper (Silicon Dioxide (SiO2) with Goethite/Iron oxide inclusions) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite/Iron oxide inclusions

Jasper (Jasper (SiO2 with iron inclusions)) — sedimentary

Jasper

Jasper (SiO2 with iron inclusions)

Yellow Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Chert (Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper)

Silicon Dioxide (SiO2)